Band-sawing machine



Jan. 15, 1929. 1,699,365

R. E. LANGILL ETAL I BAND SAW I NG MACHINE Filed June 1 2 Sheets-Sheet 1 E2 9 fill A TTORNEYJ Jan. 15, 1929. 1,699,365

R. E. LANGILL ET AL BAND SAWING MACHINE Filed June 11. 1926 2 Sheets-Sheet 2 Z J I a a J- lJNlTE srar .1. S P A '1' E ROSS E. LANGILL AND WILLIAM B. GRUETER, F MENOMINEE, MICHIGAN, ASSIGNORS TO THE IPRESCOTT COMPANY, OF MEN'OMINEE, MICHIGAN, A COBPORATION OF MICHIGAN.

Application filed June 11,

This invention relates to improvements in band-sawing machines, and more particularly to the mounting of the driving motor thereof.

In band sawing machines of the type comprising a pair of wheels rotatably mounted on parallel shafts, and an endless saw trained about these wheels, the practice heretofore has been to fix the driving electric motor directly to the base of themachine and to connect the same to the lower shaft by means of a suitable coupling. When it is found necessary to realign the lower wheel-supporting shaft for any reason in this prior construction, realignment of the driving motor and the associated parts is also necessitated to maintain smooth running of the driving mechanism as well as to maintain the uniform air gap between therotor and stator of the motor. The amount of power required for efiicient operation of these machines is relatively large, the driving motor and its associated parts being therefore correspondingly large and cumbersome. This realignment of the driving motor, as well as installation of the same in the first instance, is for this reason eflected with a certain amoun of difficulty and inconvenience. 1

One of the objects of the present invention, therefore, is to provide an improved band sawing machine in which the driving motor is mounted directly upon the lower driving shaft so that the motor armature shaft is in effect a continuation of the lower wheel shaft the rotor of the motor being fixed upon this shaft and the stator being held against rotation with the latter and journaled on the same in fixed relation with respect to the rotor whereby a uniform air gap between the motor part-sis maintained at all times regardless of the manner of adjustment of the lower wheel shaft.

Another object is to provide an improved band sawing machine of the character described wherein the drivingmeans therefor may be placed in operating position or removed therefrom with greater ease and with i a greater degree of accuracy than is possible in machines of this type constructed heretofore. a

Otherobjects and advantages will hereinafter appear.

BAND-SAWING MACHINE.

1926. Serial No. 115,173.

For the purpose of illustrating the invention, one embodiment thereof is shown in the drawings, in which: t

Figure 1 is a side elevational view of the improved machine, partly broken away and partlyin section; 1 Fig. 2 is a front elevational view, partly, broken away, looking toward the right in Fig. 1;

Fig. 3 is an enlarged sectional view,taken on the line 3--3 of Fig.1; and I Fig. 4 is a section on line 4. -'4:'Of Fig. 3. In Figs. 1 and 2 is shown a band sawing machine of the usual type comprising a suitable frame designated generally by the reference numeral 10 and provided-with a base 11, upper and lower wheels 12 and 13, parallel shafts 14 and 15 supporting these wheels, shaft 15 being the driving shaft to which Wheel 13 is fixed, and the usual endless band saw 16 arranged about wheels 12 and 13.

To provide for realignment of shaft 15" the ends. thereof may be supported in suit. able journal boxes 17 and 18 each adjust able horizontally and vertically. These journal boxes will be briefly described althoughno claim is herein made per se.

As more each journal box is provided in its upper end with a T-slot 18 into which loosely fits for them clearly shown in Figs. 3and 4,

a T-head 19 f0rmed at the lower end of a hanger 20, the latter being provided with a depending lug 21 having a threaded opening into which one end of an adjusting bolt 22 is screwed, the latter extending loosely through the upper portion of the journal box, as shown, and suitable collars 23 and 24 being fixed on thebolt at either side of the box for preventing relative movement of the latter axially of the bolt. From the foregoing it will be seen that by placing a suitable wrench over the end25 of bolt22, the latter may be rotated to effect horizontal adjustment of the'journal box with respect to its hanger20.

For the purpose of supporting hanger 20 for vertical adjustment with respect to the frame 10 a? the mill, a suitable-base 26 is secured (i f? a underside of base 11 by means of boltsi'i. Hanger 20is provided with a vertically arranged portion 28 directed toward shaft 14: and threaded at its end, the latter receiving an adjusting nut 29 seating upon base 26, as shown. A suitable washer 30 may be interposed between base .26 .and nut 29. It willthuslbe seen that vnut 29 provides the means whereby hanger 20 is supported by base 26, and that upon the turning of-nut 29 hanger 20 and the journalbox carried thereby maybe adjusted vertically.

The tension in the saw 16 exerting an upward pull on shaft 15 and wheel '13 carried thereby tends to lift said shaft, .the journal boxes and their hangers 2O upwardly, this in turn tending to lift'nutsi29 from their seats on base 26. To provide against this bolts-3l and 32 are interposed between each hanger 20and its base 26 and are threaded lintoithe latter "for vertical adjustment with respect thereto, the heads of these bolts engaging the adjacent upper end of hanger v2Q, as shown.

The :bolts 31 and 32 are normally in tight engagement with the adjacent upper end of corresponding hanger 20, and :nut 29 normally seated tightly uponbase'fifigthesepwrts thus cooperating with each other to maintain the vertical adjustment of Ihangers 20 with respect to their respective bases-'26.

Assumingzthat it isdesiredto raise-one-olf the journal boxes a certain amount bolts 31 and 32 thereof are each screwed further into base 26 until their respective heads are "spaced this .same amount from the upper end 'of the hanger. Nut 29 is then tightened upon the upper threaded end of portion28 to raise the hanger until the upper end thereof is again in tightengagement with the respective headsof bolts 31 land 32. If it "desired to lower :one -of the journal bones, nut 29 is'ainscrewed'the desired amount "from the threaded-end of portion 28 and bolts 3(1 and i 32 then unscrewed from base 26 until their respective heads Lcome into tight engagement with the upper end of [the hanger.

Thus in each hanger boltsB'l and-3.2 act to lock nut 29 .in its acljustediposition, while the llatter :in turn actsto =lock bolt-s 31 11116132.

in :their respective adjusted positions.

From the foregoing it will be seen that meanshave been provided for suppontingithe journal boxes for both horizontal :and 'vertical adjustment, the horizontal adjustment being made by turning bolt-s22 and the :vertical adjustment being made by manipulating either or. both sets of "nuts '29 and bolts 31 and '32 in the mannerexplained.

F or the purpose of drivingshaft L5, :it is contemplated according to thezpresent invention to :mount an electric motor :33 directly on said shaft for bodily movement "therewith upon adjustment or movement of the same *by means of the adjustable :journal boxes 1.7 and 1-8,;orby any other means or for anyother purpose. The :rotor 34 of-the motor is fixed on shaft 15,:andthe motor casing'35 with the stator 36 attached is journaled on this shaft by means of suitable bearings 37, bearings 37 thus holding stator 36 in concentric relation with respect .to rotor 34 "at :all times, maintaining a uniform air gap between these parts regardless of adjustmentsof shaft 15, while at thesame time permitting free rotation of said shaft and motor with respect to stator 36 and the motor casing 35 supporting the latter. Lugs '38, which may be formed integrall with motor casing .35 react with the underside of base 11 to prevent rotation of the stator with the shaft upon operation-of the letter, a certain amountof loose play 'being provided hetween lliandathe lugs 38, .as more clearly shown in Figs. 1 and 2, to permit of such (free lateral bodily movement of the anotor with shaft 15 as is ever'necessury for purposes adjustment, while holding the motor casing and stator I36 against rotation witl1a'otor 34 carried thereby are so mounted on shaft 15 as to be bodily [movable with the latter while being held against rotation with the same.

This improved manner of mounting the driving motor. ldirect-l-yion the lower wheelwsup porting shaft also facilitates placement of the same into operating position :as well as removal of the motor iforruepair or other purposes, and provides :for a ,gmaterdegme oflaec'uracyndt poasibleheretofom=is a uniform air zgapahetwean (the :rotor Ind stator.

Although the improved manner of mount a ing the drivingmotor :amd the construction whereby this :is :possible has been shown and described in connection with the @dr' shaft 15:8I1d adjustable bearings 117 and 1% therefor, it will be understoodof-course that in :some cases these bearings may be of :the non-edjustabletype, alignment-(if thesaw-being effected and maintained in some other manner. It will be appreciated, furthermore, that while the. improved *coustructim has been shown embodiediin a hand'mill, the invention is of much broader :adaptatimi and may-be used rin'othereouneetions and in machines of other typesas well.

While oneembodiment'oaftlwinventiunihas been shown and described, of course various changes may he made in the size, shape and arrangement of the parts without departing from the spirit of the invention or the scope of the claims.

The invention claimed is:

1. A band saw comprising a drive shaft, a band wheel fixed to said shaft, an electric motor mounted directly on and supported by said drive shaft in spaced relation to the band wheel, the rotor of said motor being fixed to said shaft for rotation therewith, the stator of said motor being loosely mounted on said shaft, means for preventing rotation of the stator, and means independent of the motor for supporting said drive shaft.

2. A band saw comprising a frame, a drive shaft, means for supporting the drive shaft for vertical and horizontal adjustment, a band wheel fixed to said drive shaft, an electric motor mounted directly on andsupported by said drive shaft, the rotor of said motor being fixed to said shaft for rotation therewith, the stator of said motor being loosely mounted on said shaft, and interfitting means on the stator and frame for preventing rotation of the stator while permitting it to move horizontally and vertically as and when the shaft is adjusted.

3. A band saw comprising a frame, an upper band wheel supported for rotation about a fixed axis on said frame, a lower band wheel alined with the upper band wheel, a drive shaft on which the lower band wheel is fixed, adjustable journal boxes for the drive shaft providing for alinement of the band wheels, an electric motor mounted directly on and supported by the drive shaft and having a rotor fixed to the shaft for rotation therewith and a stator loosely mounted on the drive shaft, and cooperating means between the 4. In a band mill of the character de scribed, the combination with the wheel-supporting and driving shaft thereof, of an electric motor having the rotor thereof fixed on said shaft and its stator j ournaled on the same, adjustable means supporting the ends of said shaft for rotation about a fixed axis in any adjustment, and means holding said stator against rotation with said shaft while permitting bodily movement of said stator with the latter upon adjustment of the same by said adjustable means whereby a constant and uniform air gap between said motor parts is maintained for the various positions of adjust-ment of said shaft.

5. In a band mill, upper and lower wheels, a saw arranged thereabout, a supporting and driving shaft for one of said wheels, adjustable bearings supporting the shaft adjacent its ends for rotation about a fixed axis in any adjustment, a motor of the rotary type mounted on and supported by said shaft for bodily movement therewith upon adjustment of the same by said bearings, the rotary element of said motor being fixed to said shaft, and means holding the remaining parts of said motor against rotation with said shaft andsaid motor element fixed thereto while permitting said bodily movement of said motor. a

In witness whereof, we hereto aifix our signatures.

ROSS E. LANGILL. WILLIAM B. GRUETER. 

